Example:
15 Em/L = 3.063879e+16 nautical mile per US gallon
1 Em/L = 2.042586e+15 nautical mile per US gallon | 1 nautical mile per US gallon = 4.895755e-16 Em/L
Conversion Steps:
15 × (1e+18 / 489.5755247) = 3.063879e+16